Losing Hard Drive Space For No Reason

I am noticing my hard drive space getting less and less when installing and the uninstalling software. Of course I expect the free space on the hard drive to get less when installing extra software, but not when I am uninstalling it. Can anyone tell me why please and how I get it back.

I carried out a defrag which clawed back a few GIG even though only 6% needed defragmenting. I've also carried out a clean with CCleaner and got a few hundred MB back. But my hard drive free space is still not back to where it should roughly be.

I've scoured the program files looking for anything that could be using the free space but cannot see anything obvious. Any help appreciated.

Agree about using Revo Uninstaller, but follow the instructions carefully.

Having just partly read an article in the latest copy of a fortnightly computer magazine, they have covered the subject of 'complete' software removal, and they have suggested two software programmes to perhaps try. They are MyUninstaller and The Advanced Uninstaller Pro. Another programme that they have suggested is Wise Program Uninstaller.

I have used Wise programmes, like Wise Care 365, and have found them very effective and easy to use. The other two uninstaller programmes mentioned are new to me, so I will need to check them out further.